## Mathematics Department

**Requirements for Concentration:** 9 and 1/2 units above the 100-level after completion of Mathematics 121/122 or its equivalent (125 or advanced placement). The 9 and 1/2 units must include Mathematics 220, 221, 301, 321, 361, and two other units at the 300-level.

Mathematics 361 must be completed by the end of the junior year. It is recommended that a student complete a course in which methods of proof are introduced and developed (one of Mathematics 231, 261, 263, 324, or 364) before enrolling in Mathematics 321 or 361. Reading courses and other independent work may be counted among the required units only with prior approval of the chair. Work used to satisfy major requirements may not be taken NRO after declaration of the major and only one course taken NRO may count toward the major. No work at the 300-level for the major may be taken NRO.

**Recommendations:** Majors are urged to elect at least two units in fields such as the Natural Sciences, Computer Science, or Economics, where applications of mathematics play a key role, and to consider taking Math 228, and/or Math 241/341. A reading knowledge of French, German, or Russian is advised for those contemplating graduate study.

**Sequence of Courses for Concentration:** Incoming students will normally elect Mathematics 121/122, 125, or 220/221, but freshman eligible for advanced course placement should confer with the department. Election of advanced courses should be made in consultation with a departmental adviser. Prospective majors in mathematics should complete Mathematics 121/122 or 125 by the end of the freshman year and Mathematics 220 and 221 by the end of the sophomore year.

**Requirements for the Correlate Sequence:** Mathematics 121/122 (or 125 or permission of the department to enroll in 220), 4 graded units above the 100-level (that is, these units may not be taken NRO). The units must include Mathematics 220, 221 and one unit at the 300-level.

**AP:** Students receiving one unit of AP credit based on either the AB or BC Mathematics AP Examination or the calculus credit examination administered by the Department of Mathematics may not be granted credit for Mathematics 101 or 121. Students receiving one unit of AP credit based on the Statistics AP Examination may not be granted credit for Mathematics 141.

**Advanced Course Placement:** The department recommends that students who have earned a 4 or 5 on the BC examination enroll in Mathematics 220. Students with a 5 on the AB examination or a 3 on the BC examination generally are advised to elect Mathematics 220 also, after conferring with the department. Students with a 4 on the AB examination ordinarily are advised to enroll in Mathematics 125, but should consult with the department.

## I. Introductory

### 101a. Introduction to Calculus (1)

A course intended for students not majoring in mathematics or the physical sciences who need a working knowledge of calculus. The course emphasizes techniques and applications with relatively little attention to the rigorous foundations. The department.

Not open to students with AP credit in mathematics or students who have completed Mathematics 121 or its equivalent.

Does not generally serve as a prerequisite for Mathematics 122, 125, or 200-level mathematics courses, consult with the department for more information.

Prerequisite: at least three years of high school mathematics.

Three 50-minute periods.

### 102b. Topics in Calculus (1)

A continuation of Mathematics 101. Topics may include: matrix methods, use of differentiation and integration, differential equations, and partial differentiation. Emphasis is on techniques and applications. The department.

Not open to those who have had Mathematics 122.

Does not serve as a prerequisite for 200-level mathematics courses.

Prerequisite: Mathematics 101 or equivalent.

### 121a. Single Variable Calculus (1)

The calculus of one variable and its applications are discussed. Topics include: limits, continuity, derivatives, applications of derivatives, transcendental functions, the definite integral, applications of definite integrals, approximation methods, differential equations, sequences, and series. The department.

Yearlong course 121/122.

Mathematics 121 is not open to students with AP credit in mathematics or students who have completed Mathematics 101 or its equivalent.

Prerequisite: a minimum of three years of high school mathematics, preferably including trigonometry.

Three 50-minute periods.

### 122b. Single Variable Calculus (1)

The calculus of one variable and its applications are discussed. Topics include: limits, continuity, derivatives, applications of derivatives, transcendental functions, the definite integral, applications of definite integrals, approximation methods, differential equations, sequences, and series. The department.

Yearlong course 121/122.

Prerequisite: a minimum of three years of high school mathematics, preferably including trigonometry.

Three 50-minute periods.

### 125a. Topics in Single Variable Calculus (1)

Material from Mathematics 121/122 presented in one semester for students with previous experience with calculus. Topics in second semester calculus are fully developed and topics in first semester calculus are reviewed. The department.

Three 50-minute periods.

### 131a. Numbers, Shape, Chance, and Change (1)

What is the stuff of mathematics? What do mathematicians do? Fundamental concepts from arithmetic, geometry, probability, and the calculus are explored, emphasizing the relations among these diverse areas, their internal logic, their beauty, and how they come together to form a unified discipline. As a counterpoint, we also discuss the "unreasonable effectiveness" of mathematics in describing a stunning range of phenomena from the natural and social worlds. The department.

Prerequisites: at least three years of high school mathematics.

Two 50-minute periods and one 50-minute discussion per week.

### 132a. Mathematics and Narrative (1)

To most, mathematics and narrative live in opposition-narrative is ubiquitous while mathematics is perceived as inscrutably esoteric and obscure. In fact, narrative is a fundamental part of mathematics. Mathematical proofs, problems and solutions, textbooks, and journal articles tell some sort of story. Conversely, many literary works (*Arcadia, Proof*, and *Uncle Petros and the Goldbach Conjecture*) use mathematics as an integral part of their narrative. Movie and television narratives such as *Good Will Hunting* and *Numb3rs* are also mathematically based. Nonfiction works about mathematics and mathematical biographies like *Chaos*, Fermat's *Enigma*, and *A Beautiful Mind* provide further examples of the connection between mathematics and narrative. We use this course to explore this connection by reading and writing a variety of mathematical narratives. Mr. Lotto.

Open only to freshmen; satisfies college requirement for a Freshman Writing Seminar.

Two 75-minute periods.

### 141a or b. Introduction to Statistics (1)

(Same as Biology 141) The purpose of this course is to develop an appreciation and understanding of the exploration and interpretation of data. Topics include display and summary of data, introductory probability, fundamental issues of study design, and inferential methods including confidence interval estimation and hypothesis testing. Applications and examples are drawn from a wide variety of disciplines. When cross-listed with biology, examples will be drawn primarily from biology.

Not open to students with AP credit in statistics or students who have completed Economics 209 or Psychology 200.

Prerequisite: three years of high school mathematics.

## II. Intermediate

### 220a. and b. Multivariable Calculus (1)

This course extends differential and integral calculus to functions of several variables. Topics include: partial derivatives, gradients, extreme value problems, Lagrange multipliers, multiple integrals, line and surface integrals, the theorems of Green and Gauss.

Prerequisite: Mathematics 122 or 125 or equivalent.

### 221a and b. Linear Algebra (1)

The theory of higher dimensional space. Topics include: geometric properties of n-space, matrices and linear equations, vector spaces, linear mappings, determinants. The department.

Prerequisite for all intermediate courses: Mathematics 122, 125, or permission of the department, unless otherwise indicated.

### 228a or b. Methods of Applied Mathematics (1)

Survey of techniques used in the physical sciences. Topics include: ordinary and partial differential equations, series representation of functions, integral transforms, Fourier series and integrals. The department.

Prerequisite for all intermediate courses: Mathematics 122, 125, or permission of the department, unless otherwise indicated.

### 231a or b. Topics in Geometry (1)

Topics to be chosen from: conic sections, transformational geometry, Euclidean geometry, affine geometry, projective geometry, inversive geometry, relativistic geometry, non-Euclidean geometry, spherical geometry, convexity, fractal geometry, solid geometry, foundations of geometry. The department. With departmental permission, course may be repeated for credit when the topic changes.

Prerequisite for all intermediate courses: Mathematics 122, 125, or permission of the department, unless otherwise indicated.

### 241a. Probability Models (1)

This course in introductory probability theory covers topics including combinatorics, discrete and continuous random variables, distribution functions, joint distributions, independence, properties of expectations, and basic limit theorems. The department.

### 242a. Applied Statistical Modeling (1)

Applied Statistical Modeling is offered as a second course in statistics in which we present a set of case studies and introduce appropriate statistical modeling techniques for each. Topics may include: multiple linear regression, logistic regression, log-linear regression, survival analysis, an introduction to Bayesian modeling, and modeling via simulation. Other topics may be substituted for these or added as time allows. Students will be expected to conduct data analyses in R. Ms. An.

Prerequisites: Mathematics 122 or 125, and 141.

Three 50-minute periods.

### 261a. Introduction to Number Theory (1)

Topics include: divisibility, congruence, modular arithmetic, diophantine equations, number-theoretic functions, distribution of the prime numbers. The department.

### 263b. Discrete Mathematics (1)

Mathematical induction, elements of set theory and logic, permutations and combinations, relations, topics in graph theory, generating functions, recurrence relations, Boolean algebras. The department.

### 268b. Protecting Information: Applications of Abstract Algebra(1)

In today's information age, it is vital to secure messages against eavesdropping or corruption by noise. Our study begins by surveying some historical techniques and proceeds to examining some of the most important codes currently being used to protect information. These include various public key cryptographic schemes (RSA and its variants) that are used to safeguard sensitive internet communications, as well as linear codes, mathematically elegant and computationally practical means of correcting transmissions errors. The department.

### 290a or b. Field Work (1/2 or 1)

### 297a. Topics in Mathematics (1/2)

Reading Course

Prerequisite: Mathematics 221 or equivalent, and permission of the instructor.

### 298a or b. Independent Work (1/2 or 1)

Election should be made in consultation with a department adviser.

## III. Advanced

### 301b. Senior Seminar (1/2 or 1)

Areas of study and units of credit vary from year to year. The department.

Open only to seniors who have a declared major in mathematics. It is strongly recommended that Mathematics 361 be completed before enrolling in Mathematics 301.

### 321a. Real Analysis (1)

A rigorous treatment of topics in the classical theory of functions of a real variable from the point of view of metric space topology including limits, continuity, sequences and series of functions, and the Riemann-Stieltjes integral. The department.

Prerequisite for all advanced courses: Mathematics 220 and 221, unless otherwise indicated.

### 324a or b. Complex Analysis (1)

Integration and differentiation in the complex plane. Topics include: holomorphic (differentiable) functions, power series as holomorphic functions, Taylor and Laurent series, singularities and residues, complex integration and, in particular, Cauchy's Theorem and its consequences. The department.

Prerequisite for all advanced courses: Mathematics 220 and 221, unless otherwise indicated.

### 327b. Advanced Topics in Real Analysis (1)

Continuation of Mathematics 321. Measure theory, the Lebesgue integral, Banach spaces of measurable functions. The department.

Prerequisite: Mathematics 321.

### 328b. Theory of Differential Equations and Dynamical Systems(1)

Existence and uniqueness theorems for ordinary differential equations; general theory and eigenvalue methods for first order linear systems. The department.

Prerequisite: Mathematics 321 or permission of instructor.

### 335a or b. Differential Geometry (1)

The geometry of curves and surfaces in 3-dimensional space and an introduction to manifolds. The department.

Prerequisite: Mathematics 321.

### 339a or b. Topology (1)

Introductory point-set and algebraic topology; topological spaces, metric spaces, continuous mappings, connectedness, compactness and separation properties; the fundamental group; simplicial homology. The department.

Prerequisite: Mathematics 321 or 361.

### 341b. Mathematical Statistics (1)

An introduction to statistical theory through the mathematical development of topics including resampling methods, sampling distributions, likelihood, interval and point estimation, and introduction to statistical inferential methods. The department.

Prerequisites: Mathematics 220 and 241.

### 342a. Applied Statistical Modeling (1)

For students who have completed Math 341. Students in this course attend the same lectures as those in Math 242, but will be required to complete extra reading and problems. Ms. An.

Prerequisites: Math 122 or 125, Math 341.

Three 50-minute periods.

### 351a. Mathematical Logic (1)

An introduction to mathematical logic. Topics are drawn from computability theory, model theory, and set theory. Mathematical and philosophical implications also are discussed. The department.

Prerequisite: Mathematics 321 or 361.

### 361b. Modern Algebra (1)

The theory of groups and an introduction to ring theory. Topics in group theory include: isomorphism theorems, generators and relations, group actions, Sylow theorems, fundamental theorem of finite abelian groups. The department.

Prerequisite for all advanced courses: Mathematics 220 and 221, unless otherwise indicated.

### 364a or b. Advanced Linear Algebra (1)

Further study in the theory of vector spaces and linear maps. Topics may include: scalar products and dual space; symmetric, hermitian and unitary operators; eigenvectors and eigenvalues; spectral theorems; canonical forms. The department.

Prerequisite for all advanced courses: Mathematics 220 and 221, unless otherwise indicated.

### 367a. Advanced Topics in Modern Algebra (1)

Continuation of Mathematics 361. Rings and fields, with a particular emphasis on Galois theory. The department.

Prerequisite: Mathematics 361.

### 380a or b. Topics in Advanced Mathematics (1)

Advanced study in an area of mathematics. The department.

Alternate years.

### 399a or b. Senior Independent Work (1/2 or 1)

Election requires the approval of a departmental adviser and of the instructor who supervises the work.